President Donald Trump abandoning Sen. John Cornyn destabilizes the White House's already-rocky relationship with Senate Republicans.

Trump endorses Ken Paxton in Texas Senate runoff, attacks opponent, and pushes voter ID and election security agenda ahead of Tuesday vote.

Texans are choosing a Republican nominee for U.S. Senate. The election brings to a close a bitter and expensive primary.

PLANO, Texas (AP) — Texans are choosing a Republican nominee for U.S. Senate in Tuesday’s runoff election, bringing to a close the extended, bitter and expensive primary where…

President Donald Trump abandoning Sen. John Cornyn destabilizes the White House's already-rocky relationship with Senate Republicans.

Trump’s decision to back state Attorney General Ken Paxton against GOP Sen. John Cornyn jolted the Republican Senate primary in Texas.

Vote for Republican nomination is latest test of President’s grip over GOP

Texans are choosing a Republican nominee for U.S. Senate.

Texans are choosing a Republican nominee for U.S. Senate.

Donald Trump's power over Republican voters faces another test Tuesday in Texas, where veteran Senator John Cornyn is fighting long odds after the president endorsed…

President Donald Trump's endorsements loom large over Tuesday's runoff elections in Texas with longtime Sen. John Cornyn facing Trump-pick Ken Paxton.

Texans will vote Tuesday in a U.S. Senate primary runoff where incumbent four-term Sen. John Cornyn is facing Texas Attorney General Ken Paxton, in an expensive, drawn-out race…

President Donald Trump last week endorsed Texas Attorney General over incumbent Sen. John Cornyn.

Cornyn led the March primary with 42% of the vote, narrowly ahead of Paxton’s 40.5%, sending both to a runoff.

Race had wide implications for Trump’s strength heading into midterms, where Paxton will face Democratic candidate James Talarico

Republicans have feared that the scandal-plagued Paxton could cost them the seat, despite Democrats not winning a Texas Senate race in almost 40 years

President Trump had endorsed Texas Attorney General Ken Paxton in the primary runoff.

Republican Ken Paxton will face Democrat James Talarico in a high-profile race that could help decide control of the US Senate in November.

Ken Paxton defeats John Cornyn in Texas race, setting up a November election that could decide control of US Senate.

Republican establishment to embrace candidate Ken Paxton, who it has long opposed

Sen. John Cornyn is the second incumbent to lose a primary this cycle after Trump made a late endorsement of Texas Attorney General Ken Paxton.