Fischer conceded that she had never visited the Arizona-Mexico border, but had seen the Texas-Mexico border nearly 10 years ago.

Fischer said that despite “throwing” another $46 billion at border security, the amendment — which was supported by 15 Republicans in a cloture vote on Monday — “remains fatally flawed” because it does not guarantee border security before granting legal status to immigrants.

On Monday, the Senate voted 67-27 to end debate on a border security amendment to the Border Security, Economic Opportunity and Immigration Modernization Act. That vote showed there is enough support for final passage of the bill by the end of the week.

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In the underlying bill, an E-Verify system and entry-exit system at air and sea ports must be in place before anyone is given a green card. The amendment from Hoeven and Corker would also require construction of 700 miles of Southern border fencing, the purchase of more than $3 billion in new technology for border security and make the hiring of 20,000 more border patrol agents mandatory before green cards are issued.

Fischer said the legislation still had “a long ways to go” before she could support it.